# Recip eng cyl section - Type: NTSB finding subsection - Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft power plant](https://openairdocs.org/ntsb-findings/0105) › [Engine (reciprocating)](https://openairdocs.org/ntsb-findings/010585) › Recip eng cyl section - NTSB code: 01058530 - Cases: 373 - In the probable cause: 361 - Fatal cases: 43 - All cases: https://openairdocs.org/ntsb-findings/01058530/cases.md - Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01058530/cases.md?cause=1 - Page: https://openairdocs.org/ntsb-findings/01058530 ## Cases per year (in the probable cause / all) - 2008: 15 / 16 - 2009: 22 / 23 - 2010: 24 / 25 - 2011: 27 / 28 - 2012: 23 / 24 - 2013: 23 / 23 - 2014: 23 / 23 - 2015: 21 / 21 - 2016: 23 / 23 - 2017: 21 / 23 - 2018: 24 / 24 - 2019: 18 / 18 - 2020: 21 / 21 - 2021: 10 / 12 - 2022: 28 / 30 - 2023: 17 / 17 - 2024: 18 / 19 - 2025: 3 / 3 ## Defining events in these cases - [Loss of engine power (total)](https://openairdocs.org/ntsb-events/341): 166 cases - [Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342): 126 cases - [Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340): 61 cases - [Loss of control in flight](https://openairdocs.org/ntsb-events/240): 11 cases - [Collision during takeoff/land](https://openairdocs.org/ntsb-events/490): 2 cases - [Uncontained engine failure](https://openairdocs.org/ntsb-events/343): 1 cases - [Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330): 1 cases - [Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241): 1 cases - [Fire/smoke (non-impact)](https://openairdocs.org/ntsb-events/150): 1 cases - [Nose over/nose down](https://openairdocs.org/ntsb-events/096): 1 cases ## Aircraft models (registry) - [Cessna 172N](https://openairdocs.org/model/cessna-172n): 13 cases - [Cessna 150M](https://openairdocs.org/model/cessna-150m): 8 cases - [Piper PA-32-300](https://openairdocs.org/model/piper-pa-32-300): 6 cases - [Piper PA-28-181](https://openairdocs.org/model/piper-pa-28-181): 6 cases - [Piper PA-28-140](https://openairdocs.org/model/piper-pa-28-140): 6 cases - [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a): 6 cases - [Cirrus Design SR22](https://openairdocs.org/model/cirrus-design-sr22): 6 cases - [Cessna 177RG](https://openairdocs.org/model/cessna-177rg): 6 cases - [Cessna 172M](https://openairdocs.org/model/cessna-172m): 6 cases - [Cessna 150L](https://openairdocs.org/model/cessna-150l): 6 cases ## Other findings in the same cases - [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 29 cases - [Scheduled/routine maintenance](https://openairdocs.org/ntsb-findings/02062010) (Personnel issues): 25 cases - [Engine (reciprocating), general](https://openairdocs.org/ntsb-findings/01058500) (Aircraft): 22 cases - [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 20 cases - [Oil](https://openairdocs.org/ntsb-findings/01071020) (Aircraft): 20 cases - [Recip engine power section](https://openairdocs.org/ntsb-findings/01058520) (Aircraft): 18 cases - [Tree(s)](https://openairdocs.org/ntsb-findings/03022020) (Environmental issues): 17 cases - [Rough terrain](https://openairdocs.org/ntsb-findings/03021015) (Environmental issues): 17 cases - [Installation](https://openairdocs.org/ntsb-findings/02062035) (Personnel issues): 17 cases - [Not determined, general](https://openairdocs.org/ntsb-findings/05000000) (Not determined): 13 cases ## Newest cases - [NTSB CEN25LA322](https://openairdocs.org/ntsb/CEN25LA322), Aug 14, 2025: Piper PA-18-150 (N476SM), Joliet, IL, substantial damage. Probable cause: The failure of the No. 2 cylinder exhaust valve, which resulted in a total loss of engine power. - [NTSB ERA25FA230](https://openairdocs.org/ntsb/ERA25FA230), Jun 19, 2025: Mooney M20F (N9573M), Beverly, MA, substantial damage, 2 fatal. Probable cause: The pilot’s failure to maintain control of the airplane while maneuvering to return to the airport which resulted in an aerodynamic stall. Contributing to the accident was the improperly installed… - [NTSB CEN25LA093](https://openairdocs.org/ntsb/CEN25LA093), Feb 7, 2025: Robinson Helicopter R22 Beta (N7191B), Spearman, TX, substantial damage. Probable cause: Improperly torqued intake manifold bolts that allowed unmetered air to enter the engine, resulting in an overly lean fuel-air mixture, eventual failure of the No. 3 cylinder intake valve, and a total… - [NTSB WPR25LA030](https://openairdocs.org/ntsb/WPR25LA030), Oct 31, 2024: Piper PA-32-300 (N154DC), Prescott Valley, AZ, substantial damage. Probable cause: Separation of the No. 3 engine cylinder due to a loss of torque on the cylinder base nuts, which resulted in a loss of engine power and in-flight fire. Contributing to the accident was maintenance… - [NTSB ERA24LA392](https://openairdocs.org/ntsb/ERA24LA392), Sep 23, 2024: Piper PA28 (N4298V), LaGrange, GA, substantial damage. Probable cause: Improper manufacture of a cylinder exhaust valve guide by the engine manufacturer, which resulted in a stuck exhaust valve and a partial loss of engine power during initial climb. - [NTSB CEN24LA354](https://openairdocs.org/ntsb/CEN24LA354), Sep 11, 2024: Cessna 170A (N1249D), Marshall, IN, substantial damage. Probable cause: The fatigue fracture of the No. 6 piston connecting rod, which resulted in a loss of engine power. - [NTSB CEN24LA317](https://openairdocs.org/ntsb/CEN24LA317), Aug 15, 2024: Vans RV8 (N184DC), Guthrie, OK, substantial damage. Probable cause: A loss of engine power due to the separation and ingestion of an air filter retaining bracket into the engine cylinder. - [NTSB ERA24LA299](https://openairdocs.org/ntsb/ERA24LA299), Jul 4, 2024: Bellanca 8GCBC (N749SK), Frankford, DE, substantial damage. Probable cause: A partial loss of engine power resulting from cylinder detonation and a cracked spark plug, which resulted in a forced landing and impact with terrain. - [NTSB WPR24LA229](https://openairdocs.org/ntsb/WPR24LA229), Jul 2, 2024: Cessna 172N (N74C), San Diego, CA, substantial damage. Probable cause: A failure of the No. 2 cylinder due to fatigue cracking as the result of an undersized fillet radius around the edge of the cylinder head dome. - [NTSB ANC24LA057](https://openairdocs.org/ntsb/ANC24LA057), Jun 28, 2024: Dehavilland-Kenmore DHC-2 (N590DB), Juneau, AK, substantial damage. Probable cause: A partial loss of engine power during initial climb due to a cracked cylinder. NTSB has coded findings and defining events since 2008; earlier cases used its older occurrence and cause codes and aren't counted. Findings: https://openairdocs.org/ntsb-findings.md. Defining events: https://openairdocs.org/ntsb-events.md. Phases of flight: https://openairdocs.org/ntsb-phases.md. Every investigation, filtered by finding, event, phase, state, year or model: https://openairdocs.org/ntsb.md (for example ?state=MI&fatal=1). NTSB's definitions: Accident and incident, 49 CFR 830.2 (https://www.ecfr.gov/current/title-49/subtitle-B/chapter-VIII/part-830/subpart-A/section-830.2), CICTT occurrence categories (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/OccurrenceCategoryDefinitions.pdf), CICTT phases of flight (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/PhaseofFlightDefinitions.pdf), and NTSB coding manual, before 2008 (PDF) (https://www.ntsb.gov/GILS/Documents/codman.pdf). NTSB publishes no definitions for its findings, only their names. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.